Data Debugging in Power System Operations Using Gap Statistic A
... Compared with other commonly used motors, switched reluctance motor [3-5] possesses many merits, such as simple and rigid structure, high generating torque and acceleration capabilities, suitable for high speed operation, simple drive circuit and switching control. In particular, its rotor is not eq ...
... Compared with other commonly used motors, switched reluctance motor [3-5] possesses many merits, such as simple and rigid structure, high generating torque and acceleration capabilities, suitable for high speed operation, simple drive circuit and switching control. In particular, its rotor is not eq ...
AN4058, BLDC Motor Control with Hall Effect Sensors Using the
... Torque is sensed as a relationship of the current consumed by the motor. Torque can be measured individually for each of the three phases or as an average in the DC bus feeding the motor. The measurement of torque in the DC bus is simpler because it requires only one ADC channel and the software res ...
... Torque is sensed as a relationship of the current consumed by the motor. Torque can be measured individually for each of the three phases or as an average in the DC bus feeding the motor. The measurement of torque in the DC bus is simpler because it requires only one ADC channel and the software res ...
Microelectromechanical Devices
... torque to the base speed (b). However, it is often desirable to operate at higher speeds (e.g. in electric vehicles). Above base speed, however, the induced emf will exceed the input voltage and so current cannot be fed into the motor. By reducing the induced emf, by weakening the air gap flux link ...
... torque to the base speed (b). However, it is often desirable to operate at higher speeds (e.g. in electric vehicles). Above base speed, however, the induced emf will exceed the input voltage and so current cannot be fed into the motor. By reducing the induced emf, by weakening the air gap flux link ...
c-14-deee-5th-sem
... Over excitation conditions, Effects of Excitation on Armature current and power factor, Relation between Back EMF, applied voltage, Simple problems - V – Curves and inverted V – curves ,constant power lines – Hunting and its undesirable Effects – prevention of Hunting- Methods of Countering hunting, ...
... Over excitation conditions, Effects of Excitation on Armature current and power factor, Relation between Back EMF, applied voltage, Simple problems - V – Curves and inverted V – curves ,constant power lines – Hunting and its undesirable Effects – prevention of Hunting- Methods of Countering hunting, ...
Motors and Generators
... magnetic field produced by an electromagnet. The two ends of the loop connect to slip rings. The slip rings are in contact with two brushes. When the loop rotates, it cuts magnetic lines of force, first in one direction, and then the other. As the conductor passes through the magnetic field, the mag ...
... magnetic field produced by an electromagnet. The two ends of the loop connect to slip rings. The slip rings are in contact with two brushes. When the loop rotates, it cuts magnetic lines of force, first in one direction, and then the other. As the conductor passes through the magnetic field, the mag ...
Electrical Hazards - MEO COC Oral and Objective Exam for Marine
... rise to sparks and heat. If faults occur in places where easily combustible materials are lying around, fire will take place. Fuse or MCB’s cannot stop this as they come into action only after the short circuit has taken place. The heat and sparks produced cause the damage and they are already there ...
... rise to sparks and heat. If faults occur in places where easily combustible materials are lying around, fire will take place. Fuse or MCB’s cannot stop this as they come into action only after the short circuit has taken place. The heat and sparks produced cause the damage and they are already there ...
Chapter 3 - Automation Direct
... This is rarely a problem with modern motors, because nearly all motors designed in the last 20 years employ these techniques. ...
... This is rarely a problem with modern motors, because nearly all motors designed in the last 20 years employ these techniques. ...
$doc.title
... • Can go in full steps, half steps, or even microstep – full step is where one coil is on and has full apenJon of rotor – if two adjacent coils are on, they “split” posiJon of rotor – so ...
... • Can go in full steps, half steps, or even microstep – full step is where one coil is on and has full apenJon of rotor – if two adjacent coils are on, they “split” posiJon of rotor – so ...
Optimal design and control of electrical machines for more efficient
... conference papers and six research reports were published on this topic. Optimal design of induction machine was an important project for didactic but also for research purpose. One paper and a chapter in a book were published on this subject. Single phase two speeds induction and permanent magnet s ...
... conference papers and six research reports were published on this topic. Optimal design of induction machine was an important project for didactic but also for research purpose. One paper and a chapter in a book were published on this subject. Single phase two speeds induction and permanent magnet s ...
Torque Estimation of Double Fed Induction Generator using a
... The breakdowns are statistical consistent. This could indicate that the gearbox is designed or manufactured with poor quality or inadequately strength and robustness. The gearbox quality level has been researched and verified and according to calculations the design is sufficient. The calculations a ...
... The breakdowns are statistical consistent. This could indicate that the gearbox is designed or manufactured with poor quality or inadequately strength and robustness. The gearbox quality level has been researched and verified and according to calculations the design is sufficient. The calculations a ...
Factors To Consider In Selecting Electric Motors
... • TYPE FH: indicates motor is a fractionalhorsepower motor • SF 1.35: indicates motor will tolerate a 35% overload for extended periods • SFA 3.5: number of amps the motor will draw when operating at the SF load of 1.35 times the rated Hp • HSG OPEN: indicates type of motor enclosure • CONNECTIONS: ...
... • TYPE FH: indicates motor is a fractionalhorsepower motor • SF 1.35: indicates motor will tolerate a 35% overload for extended periods • SFA 3.5: number of amps the motor will draw when operating at the SF load of 1.35 times the rated Hp • HSG OPEN: indicates type of motor enclosure • CONNECTIONS: ...
PDF
... In this paper, a 0.8kW car starter motor is taken and the solenoid has been modeled to study the contact bouncing phenomenon that occurs in the solenoid . A mathematical model based simulation is carried out on Simulink for various operating conditions. Several simulations to eliminate contact bounc ...
... In this paper, a 0.8kW car starter motor is taken and the solenoid has been modeled to study the contact bouncing phenomenon that occurs in the solenoid . A mathematical model based simulation is carried out on Simulink for various operating conditions. Several simulations to eliminate contact bounc ...
PDF Version
... Therefore, in some single-phase motors, the starting circuit is “opened” after the rotor reaches a predetermined speed. In other types, the start circuit remains engaged. How single-phase motors are started, and the effect this has on torque, is often the factor that determines which single-phase mo ...
... Therefore, in some single-phase motors, the starting circuit is “opened” after the rotor reaches a predetermined speed. In other types, the start circuit remains engaged. How single-phase motors are started, and the effect this has on torque, is often the factor that determines which single-phase mo ...
Commutator (electric)
A commutator is the moving part of a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine. The commutator is one component of a motor; there are also two or more stationary electrical contacts called ""brushes"" made of a soft conductor like carbon press against the commutator, making sliding contact with successive segments of the commutator as it rotates. The windings (coils of wire) on the armature are connected to the commutator segments. Commutators are used in direct current (DC) machines: dynamos (DC generators) and many DC motors as well as universal motors. In a motor the commutator applies electric current to the windings. By reversing the current direction in the rotating windings each half turn, a steady rotating force (torque) is produced. In a generator the commutator picks off the current generated in the windings, reversing the direction of the current with each half turn, serving as a mechanical rectifier to convert the alternating current from the windings to unidirectional direct current in the external load circuit. The first direct current commutator-type machine, the dynamo, was built by Hippolyte Pixii in 1832, based on a suggestion by André-Marie Ampère. Commutators are relatively inefficient, and also require periodic maintenance such as brush replacement. Therefore, commutated machines are declining in use, being replaced by alternating current (AC) machines, and in recent years by brushless DC motors which use semiconductor switches.